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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '64a3dc2e3b301ed2501366affa9c6b48e1c4531ee071124bdc56d3c6a98be4d9' 
  AND token = 'w4pKyqnXKn/Ewvotiw4xFji0OyFo40y6b0oVtwoMg9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00825

JSON explain

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