Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92f7ccfb703e168f689fbfcb3667ffbd9c515a702976fb3d28093558f4fcae6c' 
  AND token = 'ZU9gjZpi4iueJQePPKb5DijUkydTCZYF715uAfl1Ur0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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