Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a87cba429f9e8104ecb331e8ce3931a80429d5ab3b28609b0fba7d56ac89b5e5' 
  AND token = 'KtGCJjt6vksEjwqUJ23kulyYv0txX76rVLCyL5CyeWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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