Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39ace669e9a920b88ed20b413d348a5c5ec3411115aac46afdd9f8b7ca136e6a' 
  AND token = '3SadnkC+vHaC2sWlb+HhWAWhjX3p96ikYz/p25SQIhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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