Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f84001aeb3c216803046b5ac9e22921a119009f26d7bb38cc12cf2a5a9ea2aa7' 
  AND token = 'lQEVKMstFEZq5uxzNkx5fobcaHtvzXOQMjO8oTymHO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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