Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e92bf959309647f56305613488f0d4cf637b1c3f647af27680c8a797814f78e9' 
  AND token = 'xJJyAbKzu/+1FJVd8ElrMdxEeiLZ0fRW1FLGDcXVUNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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