Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '363f69911c0b950c16bc0ae7629a896ca9cbf49b322058dca03f604e3a1fa94d' 
  AND token = 'UNM/7y2UVZNwoE6+2lY0tXhXCZZlKul1D2GFhL6BO1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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