Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f80752a2927a223cec943d4e7a448f52d6dca2903558a69590f11c5d2538eba1' 
  AND token = 'ekyttnGsu32FSk5EPSix+naSZTarHc6lNO3MliOgUtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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