Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '783959742e0129b99a3062bbdbef23ac0d5834a1ead7a3b418b69eb6a7ecddcf' 
  AND token = 'dBjwrLwCJCoOurBjIyKh8mhQHZ1Qd5ec4NhNRrfYPfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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