Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5147b78308a4d663a1e5f1f56969c10956d8990f05a404b9d0d3c44fce4c00ee' 
  AND token = '0cAzqcM7hI/r5GqFSKgrAZMe2HXF3c21M6biuTp5apI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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