Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d16d00c2e21b4c73511d6b65180cffcd45e9db00f964a6d153bd1f5a0ac2167' 
  AND token = '8Op76CUEzxcyVI/97gM0mj1RT8aKhPxLaGYBQQqn/Vo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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