Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4f05706df14be294b00974ee54af4274e6b6e5d4c4f83facae7594458db19ec' 
  AND token = 'jwbKtbMOn6raZBO0BDpGIbaebuqV8elii+zvr46+/Vo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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