Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f068fad66d0df8a1cef1c192f5e357af8a03049fa8e57341edbad19831d4a5f9' 
  AND token = '5ZaJ2yawFwF2oK8128b5yK6jL9IrSNN4Slyu8jh1x0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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