Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42b671b3c374505f90099f741de30eb1a7a28d099939b36b6d8f0d46cbc6ab7b' 
  AND token = '8oR/QgDKPBYys5I22XSv9lLIs0ZYiciT80b+D7HlS00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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