SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ca6b4c4d376f192b78b3137318f3c96791f6142b501a8fb46bd5aa2d244b5a32' 
  AND token = 'y5vHNO5ieIchVx8oxugRRjKoyWW5GyPrUBkR5zWzqm8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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