Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9ddfeaaa45ff6d1adbf94edec662192b835b4fff95ffa9c1e87b6a1cf29a70e' 
  AND token = 'RcyblizDOhVNh94Aa5kKFgLh7U5I8Ry56nbarjLh9Bw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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