Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac07ac285bce36f282348cc90d6e004a19c48db3a22d646244ae0f5a2f99525b' 
  AND token = 'LDuz1//CmhzT4+s7OzIN/BStrO3vwprZdu/KWhOXEnk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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