Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abb5cc4dcb5915746d198f45c898fb98f3cf646dd3972ea0851d3b52a08d0da2' 
  AND token = 'fFA0rpN2wbtr+EAFV6aN3yhhU390jbJphF1KShYWqXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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