Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf20492cb9ce7fb49ff1f170c9f473d957ccca01cd661f8948d944b5add75cc8' 
  AND token = '+UD1fWfdZT5TZZpP74YDKCoJAEIhGDsftuMUZovKTP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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