Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b0d61b7f36c67d7cb42813aa7f1c0c9f239b9d3b0ac5444f828f0e5149483d6' 
  AND token = '7WJPngKoR0FMtu7EUHa/X1qv7k6/KxLHrn5Ao69RgKA=' 
  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"
    }
  }
}