Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '840c196f05da561534b6e77e4e0d89c604ac87eea9407da68da63e5b66f31553' 
  AND token = 'kHOVAv0ZIpaY0C+eamKEULdYgup2m1B9YYugRCVumcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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