Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8576349f32efc0e9148a0b3e6fde872bed4374d771a95e241a56e01e659f114f' 
  AND token = 'oo12IdHQiswXdEWW0f1g/RNTjskV4Uj8IUCLJ/NgH6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}