Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2f88b5dfc18cbbe002e03d707dc506ef2485f3a6639389348cb1d7233f59210c' 
  AND token = 'CXqzs/bab2tKekEWNhkByssgO+1fh7g8ZyMStNTk3Vo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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