SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b5339a82f7ba6994a5cac975b86265dee84cc147e8f97212d57162b52b913073' 
  AND token = 'o3KI4fHZNQzuRdpUq9ZRw2LSVFefNkwInE6fQlvmg7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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