Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3d0bced0e45e939955a435a596257986159aa9b69eda38f24938393e46d9aab' 
  AND token = 'E4uHlvfVujXVaP12KlzlSaZJE7rI4vaKz0+pQY4G4Xs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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