Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ec4b1c06b926f6728967efbcded3e6b9037357d473c524cfa95b0bf40fa97f3' 
  AND token = 'EbHp1u3u2+ff71iDaiv7iwhVKJcc4XPnjdaG0E0t1RU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}