Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b875a148e6a2fe8c31c77bbafacd683497d3dd49e6c44c5fdd0baf798833746e' 
  AND token = 'kr5j5Vsc2d7u8fveriMs5TdQMoGp//3yO+rx8NSyTbk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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