Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '462f7e70a67cb7d490df2aeee61f31a1c9f0def4b3448da96d425f1d5d442db1' 
  AND token = '+630aUBjfHAyib+EzNINtM7Y2ptdGS4mGQqWB8MI/hM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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