SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '035b290b0c76a0ef5c9fe4c9175dd69729fd7773326f7256d960a998472b9ea8' 
  AND token = 'mWwilUh7moy6q82TFpqAycz+JVqVYoaZvxjx1033CR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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