Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9b0b806068a608354651479ba5ed7cfff44c24daa4bfee07cbd1f95c7b0e598' 
  AND token = 'msCrYRXO2oMxxmotWs+9xvvfrvRo0TJJyJknOnsoU8c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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