Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '969fb2a6ab95b39bf967f9cf970683abcd636c379e49c7badc677612978485f9' 
  AND token = 'Up7IPIaMCqP8HTFA1/MDlr7ZeNhc74IayvYvTQcX/wk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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