Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57ff58faf5ec0962a8f4d3a1e7daf9ee428272fea49c81a74b27c85e3317fcdb' 
  AND token = 'XwZR+4zh6zzacY2VIJxduRatNYf2kAukC/amgNdoOlw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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