Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5551470f3ae2e638aac298137f2d2c22e9cf8d2afc06c6a47969dc570bb4d8c2' 
  AND token = 'QDcOvMaugyd+rbkVqDJlwq2guv2Mp7Jt9rAGmpn+d8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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