SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd987caf1597e0fc3f0c827e8b0c38dff892c7ad2c39911304d184dcfdc82a326' 
  AND token = 'vjJIzcTwamGU8BKp9Lh9IINW3/YdVlGqBa/bOw4IG+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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