Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8452f027d9e14660b1bdfa0f398364573b977969b078612c9b1e981a8b041e9' 
  AND token = 'g0X1zUnGIzE9tSntHVzIVsbbF1baQ1sI16aqViDLNzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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