Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '818a0294d9409076535ed174c7061c65c893beeeb9d916085cdbe483ac811029' 
  AND token = '/rU/LNIZv+/nl9+2Mo/BFeSL876W3kiHPdZ8wWmqBug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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