Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd17221be7fac4466157c141c23302608302ce42257b42ef46da3ebc81bf65437' 
  AND token = '5Tx7a9lOCAviUsu2+2lE4DN31uXJ9taxYCiMPBUzkEI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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