Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3d1d02387ada99ac10807be799a1c3032b7c4abcbec48ccdfd5304bd4ba3783' 
  AND token = '/cPbARqb4tMideRi+yT+X1Jxy4N/NuvUaKPzruG3xKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}