Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8608558dbfa3dff0d0ef8efd90c849ee637f17e0625b8661542a9d92577c6259' 
  AND token = 'V77so84cg95Qfe76TXCcLn3b/yZO8dKEmALGlL1srf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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