Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '546c313d307a1149177e79866752d45f7a3006ce89c139ffd2834338f46e5c38' 
  AND token = 'THKur2nZRnIrzKQhkH4mncyjBONfNELiUwbIBcsdZas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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