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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69e4b55d4db9f64cbf2b4b7ca5ac156462eaabd865874a763750fca4574ef35e' 
  AND token = 'DYTf+yS+qijSYpfdsiqxk72Oj4G478KVa9m+dzDvzL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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