Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f70112485d243d49cfa27677052ac1a7a4a8425d353ebbe32a6ea88bc9176789' 
  AND token = 'EUffYb7u02dRCt3ekUhqnJIYj6ahAOrIErm6hTO4tug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}