Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fe0a4a5bf4037cd9ffbe074ae66c695af1e3bdf0de6ce39ac61dc2ec81d2c31' 
  AND token = 'qENq6NPdEpsq/8sgng6JAFXT6PGbDk7vx8FMP4ujLwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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