Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '599419f5d82c3ce1972cd925aba5ce9b6f936a3623cef9e725b232d2f7e0ccc9' 
  AND token = 'gfJumDUR9nCDHAXtEDjPdyWYGoyzK6jxSU64Ql70euc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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