Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdf23a8b6bc74b72f49c0fe65d72a59e3adbf15582f7b015613095ee9ad46314' 
  AND token = 'NLt5vOUPtOboK5uK76PTZrTX1Y+rFv1L4mia96gnSxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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