Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36409ac4455c415ca2304d64019687d29d5e4047a887959bd1818c2dc79316a2' 
  AND token = 'xz9HfvtPfLq4KRnY82WEX+SjoG+p4ZRiok1/1007tS4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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