Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcf78fdefd1d3294a79472f4b8a54b34e0147b2e5981af759d4b257610b9a379' 
  AND token = 'be/bhOsMAPGTg7OZA9hiJprMM3IBosxRzaSrqVRR6yg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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