Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '1696c59a02b560a1d60f3824c18d838b820e758354b031a7fc18ec94e00aeea5' 
  AND token = 'V1cqBOe/g9topNn3s/2TjtR3+BwwkflZ5auzBPMtkfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00741

JSON explain

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