Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af54594cdb331505f7d91de6b1b0af28e8e75a92ae4c7ce4b98987b61b262312' 
  AND token = 'pkgMxLDiKH3558zsxcIdRAJJXYe3qg1f3nCF69p4jCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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