SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5c227e0b65f0530c15015f78d4ba3d8b26b64809ddc3454b3c617cdf308d001a' 
  AND token = 'ge1uVU5G+GFhm8RcTpBMqSNudvWM2FmR1oyJRWVv4LU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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