Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6727848f3ac748e6b2fb5ad117443d8f60a2963f1fad1cd9774ad3d895603055' 
  AND token = 'XMEg7U5w7Uo6iFjqW3RiJaGmibEJ9CarCx5/6zaq9r4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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