Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '093a728d93615cdc7a385191b542e07e03a8597c842227ef1e2940fb62f6a0b9' 
  AND token = '66NubL1POgc5xHqYZGiVp3mCK10YFVIb9UTVJpu0pCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00124

JSON explain

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