Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bef3e1a4fe480c50ba75952f08b3d9ae80b2f01e560de95b23ff976e886ed85' 
  AND token = 'zNFsJ6DO1PshOuRzgeOgqcFHL6LYzJR+rk88GPh/MGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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