Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5aa1c5efa8528b73fc92180f41dd4126b15812d87dcba4a3bf81a3366d9c4db0' 
  AND token = '6GpxeTvii6pTNqgrmvFF9itCzaa7ZOYMuOU7H2TYakM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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