Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'cb82ee8daf8714b89199f406aa0e1ad4806f29b898f849eb2ee7520f3a9ed8c7' 
  AND token = 'Xjz4ktQn/aqoEOgYk1LMKVOaCju20QdgNEevseHiwFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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