SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cfa83c972cee28231846712c2f6fac51e605b0a5053f727f16b3ed41752b927' 
  AND token = 'Hbjf26zaL8iBrgXI1VclwnOS7WVUZqBuiQpxNwz6hQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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