SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1653409aec6bff0298da6a0f22f208f67d4bba06530b95e899f31b851f9b8c1b' 
  AND token = 'e7gaFcDAgRf5tYJuFxAPO+SqHBwQ2NyGZ+79hdX+Jw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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