Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '076d3eb89d9f5bdb84170d340b8e4f533494d9a1ed5aad779fa65eb7eaa9b0b3' 
  AND token = 'IcqAk+Nep4+Qhvkp0GD+s3i0XfYsG6GRQO8hxN6A7ZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00103

JSON explain

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