Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30ae98369ed8032242b6ad4ae58da7d6b477767e5316ef8a17e6dccaf09636d4' 
  AND token = 'WmTwkCwOVC9tcQ1pxLJxDwkbr9A8koIlsiInR63FNmo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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