Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbde8170357073c8033e5e7dd656987f44d4a813290ea992653a597bd725de89' 
  AND token = 'b1Ld1vAzkL4TeqPG3c/W3xY+PJ7MoqzYN9g52tZTG5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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