Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a6c226c4f388d2d1dff2e08be388f7ba6468a8364f5e7af849b46f993263b09' 
  AND token = 'JLoZjfwOsY6kE79MrkobSKHE60TmxwwH0rex0D3tawM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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