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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'e2be784d91667b6d9dd2b7b35e156810a46821c96cee0b942d58a97c08ab345a' 
  AND token = 'lodO5dcGOzk1oL/83ZoaP+ft0qQqwOJlYAXHWW1eZbs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00767

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}