Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19fa756e62f62dae083e5538d444680b7be1166ce8c9e8254869c4c560411afe' 
  AND token = 'Pa9TjDwkGT5mz74ErYtGo8JYJv3a8JnPUw93PRrN1z8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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