Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8edb5d4998e7b3f72d3af9073a045275939bd4c4a9154e96f5e917dfc81d5bb4' 
  AND token = 'oKM46P8ybRawV3s+0l93ZaFzF4SuDxEqmVSclHpfg4k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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