Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40a1ebe5dcf0293e6a1feeefef4ca06ecee26665fb5b128241b617da61735d99' 
  AND token = 'Omc1sXOASNWrh1wvaT5iSFchq5KL0meiooQFjsHn2VU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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