SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7098440d6877f4ad63e5a059bdca493c6c4cf84b7d6c541074de39a097822674' 
  AND token = 's+sho/JYGm41GrGK3cJn4aJqHuH/wOYWoQPg0zwhiMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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