Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c205ba6c1ffee1ee4bcaa736d7d3bc6d506327f2aa498fdc77e25157ab8a9128' 
  AND token = '27F2GCI7XiBA6fOGw7wmtT4ociTgjzKN2nPaEDg6TR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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