Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7071d0b45aa35b38341b5419a14ed9779a9e18413720e254f31edf685fd4a36' 
  AND token = 'W/sEgTOtZ5MSC8tzzLmuDecTuSIpbGsxmbe1gPzWCMc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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