Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20b103d75d963692b939ccc2f634e1f6004692ac9b568b2cb3607810930d6037' 
  AND token = 'dfsSYMvZoPJ94zbBpAm0s7Q/oFjppkOoBGs2PvrTwOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}