Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33e2cb30ed626b55dad9057c0bb060f32a68a5fbeb0cdfac34b0e5456d103435' 
  AND token = 'uv/yP3aZQ5ByUHnA8HS738Kd7LH+2PHa7NIPMBjHcug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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