Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0431eb1340d17f872451e159b878413e169dccb2ba84208e90f83e0319057cf5' 
  AND token = 'ZESoraPaQiL/LR3g0ZzQdc843R6E29SqxKmw7DbJXac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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