Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '163e28cfbf9e312a6c0a750077fb393d64fdb1db3ad37691fb3f2949ad27f929' 
  AND token = 'S4fRfUIOLG936o00ViNRMBPFcrnIgSZsZ1muHzG6MWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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