Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4dbafaa95bc29da49332a58a1ffee47e400f84a8e67e169deea8473c739c04a1' 
  AND token = 's1ed5Zw6TPW1Uu8w88xgaltmyxal2i+0sTbdFIxan/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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