Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b68dc5ecbf42c8f123a4b40b11394cc95d6450208393a8ecd88971caf59bbc1' 
  AND token = 'W2LUF5mbi6g2afk/KookntXwkBJ7VcXfFgkxgWqqG4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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