Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab92a635efe342df385859eb604de6bde86dc05029a1d99de4c7939365938ea5' 
  AND token = 'C8PS3OVuj4hyzRWf/YU/3X0KLehSAvst5zgZ4KjxjZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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