Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fcaf20fe7696f7c3370452b4fdfdb71a3299bfe5c74218fdd62157c4b1dea85b' 
  AND token = '1N+LnDp2qngGZJrTmpbsEsdxRPatbOExPezY0dglNrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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