Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e872483a9668e1025a33d2f547ade9ecdaef08a6fa8415abb15eb16e69964a32' 
  AND token = 'alJg5ZFDOvKlg6pe5xXwbJqzvceLSJSUyKaBFaRMqIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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