SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27f1d506f8064d6986caf833f5db7134a36311b4c2a9acae88bf86524cad9ddb' 
  AND token = 'osyuP+qXaIhHB5PuGN/1EM9yQVY1E2pQ6nJlYMUv0zM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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