Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dac0bbdd919273215509563e6879b3830b9866428af52b7cf2b37c0c90ca908' 
  AND token = '4pgBMMCxr6lvM5RNbrUg3QAKXg2ddE+zzQGcpdA5QZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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