Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04a67b00415ee77443f7e2ff7d2f02cb36ac09096e317c19ffb6adc7d1fb68ce' 
  AND token = 'AsbTrevJoS4EdRkJrzzRiYZfB6gDnjTaVd0q6/c9K/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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