Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0801304d20da67f28cb7e7d968694704b5bc9877bb88cb63383cb07eb39e1f6' 
  AND token = 'JPw61nOOy//5qcdcyzAu3vhfjgPLll8+V/WP2cDzaic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00065

JSON explain

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