SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2483e7bd59b61ef927ff4a138e912630ba79be4e57389f62e59ec9204b7112f0' 
  AND token = 'IqoUv+qZ64gMZo/15ejDz+EDLE2ZDoP/r5ijn36PTuQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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