Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9662f4f3d8f6305c718179d9abd2d1dc6480c4218c0caabd6dddeb2de3990eb7' 
  AND token = 'a6EHD4UwdCvHljGgd13kAsKGiKinaXa5rCXvrn2mpiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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