Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '505e15c87e054974992b1ec2e8e200ac3219d3bd26a225a0b1ad361045bd0809' 
  AND token = '8+uRLZ0CC67WtoY0hsl5jkIFz9HuH6+QivWTAhDpTU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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