Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b7291bd1bc5fe26c36c011039fec7aae5d1d573cbd5a2e7248538807af3bb39' 
  AND token = 'ZNW1I3k64MOmefP4Nr81lqsPh0khGQLGaLyxrCeV1E8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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