SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77777f51b1e6f372a4db813c593a2f8c38c012c2427cd63d3a0da847779c670c' 
  AND token = 'XUwy4BlUD8qJ4ZRH8VB/6YXEclb3/yzYI9FgCGobftg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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