Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abe5f0e119fb54c60ccdbdf8d94e32d86cd728fead8415695533960e2130eca8' 
  AND token = '8uE+kpZB5zgfAvgU6rtWBsw9YmFA0e/R7wFnpqqt4wE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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