SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7d299fbb61e226d234e89a7cb797f92c3a3633cd2796d56acbc0b9d434d6df91' 
  AND token = 'zY0WLq4vCKBZSTUxdua+hzlZd0ztvj4cMYbVSAufuPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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