Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0de5c4769f8b9f4d4ec5a0f842178cb730127e6547408cb320c9df7379f55dae' 
  AND token = 'KmbGB2OV2WK7P+HFY7Ab04ZMXPKOXeSRJ8ax4BsBiC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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