Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ff64295a9115ce84bfa8c28edb698a4d6bef5630f8ce98b7a98a55070e44bde' 
  AND token = 'J0SRIVytz2LU5OKauV0IJB2x3ePTynBa/eywfW34qaw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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