Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd0240cca835576b29465953bd804897f0c5ed350c3d8be2ec72c6bc5a5e63cd' 
  AND token = 'Efue9Zt55Y2/0N09IyMXkMSSP/LmQmrjfRjMwEmdLdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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