Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '238a3f2bf713228451cfef57d6fbf87ee5441d90a403c5462a5985f75274ad34' 
  AND token = 'mt8MljyQn4iAhfCcWlb/GiYkNRCa9TSybFrf7hu5TZk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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