SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f30197fd39324acddc81dc9351c369ebe38231bfefcc595ba3ab027ff664d7ec' 
  AND token = 'z05RWtg3tK+/oltBWfAox6Ccz9kjJFoPhqyX8nRzY4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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