Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79650d4a6901bbee5e91745748d557640f2bc8a2d4c818679f13728bc4b69069' 
  AND token = 'LfPiTm01UQx1K86JUI+SVm7On1eRsAOYhWlGMoG0ed4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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