Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '796c5be5482e86f452584b566bbc8562a2c9369eea89f326007e8c55cabfaff3' 
  AND token = '+f3JeWcC9pU5mpZiH4SMbsnphsqz4dw7t6R7ud4zI20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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