Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e9428a68acfc996fc8c381f1f7659cebdc287a96e3ac58d17414204b4dfa9f4' 
  AND token = 'A5O+mTL0yDwUsmC1fsVTlinPNibgbwt43YH6VRLi3Ss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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