SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '96e8f59097199836525538e22169b44fb11aeeb60f6ec7890a0fc2638444e522' 
  AND token = '1hoyC/9aoBxSHgMDU+9VxXRqrzokmtez33JW2R2PEAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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