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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d97e2c8e0eeb682347b77244ec2e0ac991ddec139d0c65698b4616e7fe47472' 
  AND token = 'w5YD+0t4mvmkKpPAxLTAQSes8UqvTUUUzRm3M5Q027M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}