SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7113c80732926ec30745b54264529d139215651287fbb73e9bbb1142dc49f0ff' 
  AND token = 'iLk4GdMv0MT/RqbwtGUU8XbfcMRZsbJXvZx7+XrYz9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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