Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6241638afe12c2633c1089dff57928fef6b4f0ae1db996ffb8035733c948cd96' 
  AND token = 'PPYLWNlsEWKASrQoPVvpY5FvJmDoGMnlQKpfoU7mPmI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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