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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d166b7e4650a6d190a6ca18867e1f8a5fde5b49f365d157560b2ba9ef69b430' 
  AND token = 'GjARLYIC29ObN3MN5KW7bPkm/rIwXM4OnOOvxl13rn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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