Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e3f0ca1a029cde6ae557e3320eadb386a335fe1b93fe117f1b14455b58db5bb' 
  AND token = 'tX9w3uovaAJqPuidOHN/HIimsar33kOtZrUiM6VDxU4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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