Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2eb58fe11a852f35058354ec2fd8ef6250c0a75ad8b167cadf7202e4bb25d6c4' 
  AND token = 'pcxBB3sS3z3YlptSrJbVW596G8UmjPdlfMuRn4JSO3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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