Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b06276d4f8e6b1bb9b3534ff9ca3422a0f3398f4e10fb48f183827fe32d5ea5' 
  AND token = 'QIoRcnZeVcE7bnGHX9Yne8UyVVgtWeKp5fJnlMbCnus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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