Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '653988ae234edad1a0c04d48af54a463f921d7032bbd435405f1bfefa2474c1d' 
  AND token = '+xiqtsiOecRwxiMMJ/MBWAb7GAlYN+6uR5DSYaqWGjI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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