Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e427c60ff2f6c05aee2ac0902772c56ef056c306a02a8ff60ea523ad7a440901' 
  AND token = 'isNZjJhoNpSDX/B18qiccBYG5fEgBDzMChTRnb212Mo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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