Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9c26064ebb318f870b37e13752cd6ecdd54d68b1f7e09c50bd6d72e98e9dea1' 
  AND token = 'ewYRhNHONMX6sSGsDPfC56ecrSECQGcDzyL5R/3qcVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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