Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a93a07f62990b78cde6d15235256366e1e04c76f9a0c1202673426c15412dcda' 
  AND token = 'FcacVSL9oJRMaHdULS/R8bFfNF3SxEq+diIyAsU6WaQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}