Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c031b71371b5fc06e50d37b38450f89be806f71afb62bdb2818e23d96f886f2f' 
  AND token = 'uCMoWsUwYgbhuSrY1z39+CzrnM8lXTTY1mTouwLoRvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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