Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6fb3b9577c034883026d76700a38efc02f06cadc6ca12dafb40c3f8313e4e6d' 
  AND token = 'pCD4Nte0WgyUOwRA2J+XvygldQr+LjrodQx0op4k2zY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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