Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c04311d64133be672979fe3b5de50fb6b2b4b36c02e74efb59b253dbf249984' 
  AND token = 'bWbCN/oF1xM57sAB30wiju+44V4I+6vrtq0TkPWQnoE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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