Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a19fc159cd5e3f7b6f145bc90682a687cc81c8e7e5d1db45d9858334c23b2c2' 
  AND token = 'oS0LDXypb9RuDJp0hVo/vOuysytiKLnZbXdrw/emOBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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