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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8bd52dcfda350f372901cc04c8ea62afc1ef331ba6a46ca4f3573785c9c8a88' 
  AND token = 'Aba/9PB+YjEyswdo+YW8gYPRzpoe3AO8XZrTN7E5xqM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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