Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9bdc080b439cc0b87849afc88c4735684600d76a3ad4dde3889cef815369f21' 
  AND token = '+idIwL1z5PbazWkCst0GwzLBM1SeP/XdV6MddDb+2+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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