Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f9aa081f1c0e915ef875a98f3ccbc6b0a843aeba9f346e043d314a8dd903a62' 
  AND token = 's/ZC/AQZSvCGa807oN5qGpJTQtmNU7eeKjh36x3X1Sk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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