Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f28883541099e42473e4d2c7cc5c9ad59a178af13bf7698c0f42ce4d3a838d4' 
  AND token = 'H1xcMj+pbMse2Fyo+IKNHv4sUHhXstSz7wgwwbcRlEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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