Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a983a42122ee47abc8f9cd7f18e94bdfd1ac0d6cdd997322b5ef974d76eab69' 
  AND token = '/pI4hCSW1fYEQybP0eBKT6uhPWN+3x/uVN5QQTGM/bI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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