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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '79fb2befedc0631189ae2fa8cb18bb5a5fe0fa44c40354af5aa4b8396ff35886' 
  AND token = 'u7rqIC1yM0XdOusn9SxiKIA3X5xdIJKFAaRacyEHQOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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