Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e98718bdefe9a3283ae9e8f8a96ccab26e888204ba6ec451881a8b5cf50c127' 
  AND token = 'auX5RNNwJ2qU3f2nNVZQUCcUBt1N6jfVNyfKXsByoKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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